Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 4 6 or 7.
A252520
Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 4 6 or 7.
Terms
- a(0) =1093a(1) =2492a(2) =8354a(3) =17804a(4) =74181a(5) =268555a(6) =581529a(7) =2449868a(8) =9015835a(9) =19533141a(10) =82653526a(11) =306473786a(12) =663815208a(13) =2816595425a(14) =10483644117a(15) =22703178745a(16) =96473171480a(17) =359788629017a(18) =779072416553
External references
- oeis: A252520